Universal $R$-matrix of double parameter quantum affine algebra $U_{q,Q}(\widehat{s{l}_2})$

Fengchang Li, Masatake Maruyama, Hiroyuki Yamane

We give the explicit formula of the universal $R$-matrix of a double parameter (or two-parameter, or multi-parameter) quantum affine algebra of type ${\mathrm{A}}_1^{(1)}$. For $N$…